16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 #ifndef SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP 25 #define SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP 26 27 #include "classfile/javaClasses.hpp" 28 #include "oops/instanceKlass.inline.hpp" 29 #include "oops/instanceMirrorKlass.hpp" 30 #include "oops/klass.hpp" 31 #include "oops/oop.inline.hpp" 32 #include "utilities/debug.hpp" 33 #include "utilities/globalDefinitions.hpp" 34 #include "utilities/macros.hpp" 35 36 template <bool nv, typename T, class OopClosureType> 37 void InstanceMirrorKlass::oop_oop_iterate_statics_specialized(oop obj, OopClosureType* closure) { 38 T* p = (T*)start_of_static_fields(obj); 39 T* const end = p + java_lang_Class::static_oop_field_count(obj); 40 41 for (; p < end; ++p) { 42 Devirtualizer<nv>::do_oop(closure, p); 43 } 44 } 45 46 template <bool nv, class OopClosureType> 47 void InstanceMirrorKlass::oop_oop_iterate_statics(oop obj, OopClosureType* closure) { 48 if (UseCompressedOops) { 49 oop_oop_iterate_statics_specialized<nv, narrowOop>(obj, closure); 50 } else { 51 oop_oop_iterate_statics_specialized<nv, oop>(obj, closure); 52 } 53 } 54 55 template <bool nv, class OopClosureType> 56 void InstanceMirrorKlass::oop_oop_iterate(oop obj, OopClosureType* closure) { 57 InstanceKlass::oop_oop_iterate<nv>(obj, closure); 58 59 if (Devirtualizer<nv>::do_metadata(closure)) { 60 Klass* klass = java_lang_Class::as_Klass(obj); 61 // We'll get NULL for primitive mirrors. 62 if (klass != NULL) { 63 if (klass->is_instance_klass() && InstanceKlass::cast(klass)->is_anonymous()) { 64 // An anonymous class doesn't have its own class loader, so when handling 65 // the java mirror for an anonymous class we need to make sure its class 66 // loader data is claimed, this is done by calling do_cld explicitly. 67 // For non-anonymous classes the call to do_cld is made when the class 68 // loader itself is handled. 69 Devirtualizer<nv>::do_cld(closure, klass->class_loader_data()); 70 } else { 71 Devirtualizer<nv>::do_klass(closure, klass); 72 } 73 } else { 74 // We would like to assert here (as below) that if klass has been NULL, then 75 // this has been a mirror for a primitive type that we do not need to follow 76 // as they are always strong roots. 77 // However, we might get across a klass that just changed during CMS concurrent 78 // marking if allocation occurred in the old generation. 79 // This is benign here, as we keep alive all CLDs that were loaded during the 80 // CMS concurrent phase in the class loading, i.e. they will be iterated over 81 // and kept alive during remark. 82 // assert(java_lang_Class::is_primitive(obj), "Sanity check"); 83 } 84 } 85 86 oop_oop_iterate_statics<nv>(obj, closure); 87 } 88 89 #if INCLUDE_OOP_OOP_ITERATE_BACKWARDS 90 template <bool nv, class OopClosureType> 91 void InstanceMirrorKlass::oop_oop_iterate_reverse(oop obj, OopClosureType* closure) { 92 InstanceKlass::oop_oop_iterate_reverse<nv>(obj, closure); 93 94 InstanceMirrorKlass::oop_oop_iterate_statics<nv>(obj, closure); 95 } 96 #endif // INCLUDE_OOP_OOP_ITERATE_BACKWARDS 97 98 template <bool nv, typename T, class OopClosureType> 99 void InstanceMirrorKlass::oop_oop_iterate_statics_specialized_bounded(oop obj, 100 OopClosureType* closure, 101 MemRegion mr) { 102 T* p = (T*)start_of_static_fields(obj); 103 T* end = p + java_lang_Class::static_oop_field_count(obj); 104 105 T* const l = (T*)mr.start(); 106 T* const h = (T*)mr.end(); 107 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && 108 mask_bits((intptr_t)h, sizeof(T)-1) == 0, 109 "bounded region must be properly aligned"); 110 111 if (p < l) { 112 p = l; 113 } 114 if (end > h) { 115 end = h; 116 } 117 118 for (;p < end; ++p) { 119 Devirtualizer<nv>::do_oop(closure, p); 120 } 121 } 122 123 template <bool nv, class OopClosureType> 124 void InstanceMirrorKlass::oop_oop_iterate_statics_bounded(oop obj, OopClosureType* closure, MemRegion mr) { 125 if (UseCompressedOops) { 126 oop_oop_iterate_statics_specialized_bounded<nv, narrowOop>(obj, closure, mr); 127 } else { 128 oop_oop_iterate_statics_specialized_bounded<nv, oop>(obj, closure, mr); 129 } 130 } 131 132 template <bool nv, class OopClosureType> 133 void InstanceMirrorKlass::oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr) { 134 InstanceKlass::oop_oop_iterate_bounded<nv>(obj, closure, mr); 135 136 if (Devirtualizer<nv>::do_metadata(closure)) { 137 if (mr.contains(obj)) { 138 Klass* klass = java_lang_Class::as_Klass(obj); 139 // We'll get NULL for primitive mirrors. 140 if (klass != NULL) { 141 Devirtualizer<nv>::do_klass(closure, klass); 142 } 143 } 144 } 145 146 oop_oop_iterate_statics_bounded<nv>(obj, closure, mr); 147 } 148 149 #define ALL_INSTANCE_MIRROR_KLASS_OOP_OOP_ITERATE_DEFN(OopClosureType, nv_suffix) \ 150 OOP_OOP_ITERATE_DEFN( InstanceMirrorKlass, OopClosureType, nv_suffix) \ 151 OOP_OOP_ITERATE_DEFN_BOUNDED( InstanceMirrorKlass, OopClosureType, nv_suffix) \ 152 OOP_OOP_ITERATE_DEFN_BACKWARDS(InstanceMirrorKlass, OopClosureType, nv_suffix) 153 154 #endif // SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP | 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 #ifndef SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP 25 #define SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP 26 27 #include "classfile/javaClasses.hpp" 28 #include "oops/instanceKlass.inline.hpp" 29 #include "oops/instanceMirrorKlass.hpp" 30 #include "oops/klass.hpp" 31 #include "oops/oop.inline.hpp" 32 #include "utilities/debug.hpp" 33 #include "utilities/globalDefinitions.hpp" 34 #include "utilities/macros.hpp" 35 36 template <typename T, class OopClosureType> 37 void InstanceMirrorKlass::oop_oop_iterate_statics(oop obj, OopClosureType* closure) { 38 T* p = (T*)start_of_static_fields(obj); 39 T* const end = p + java_lang_Class::static_oop_field_count(obj); 40 41 for (; p < end; ++p) { 42 Devirtualizer::do_oop(closure, p); 43 } 44 } 45 46 template <typename T, class OopClosureType> 47 void InstanceMirrorKlass::oop_oop_iterate(oop obj, OopClosureType* closure) { 48 InstanceKlass::oop_oop_iterate<T>(obj, closure); 49 50 if (Devirtualizer::do_metadata(closure)) { 51 Klass* klass = java_lang_Class::as_Klass(obj); 52 // We'll get NULL for primitive mirrors. 53 if (klass != NULL) { 54 if (klass->is_instance_klass() && InstanceKlass::cast(klass)->is_anonymous()) { 55 // An anonymous class doesn't have its own class loader, so when handling 56 // the java mirror for an anonymous class we need to make sure its class 57 // loader data is claimed, this is done by calling do_cld explicitly. 58 // For non-anonymous classes the call to do_cld is made when the class 59 // loader itself is handled. 60 Devirtualizer::do_cld(closure, klass->class_loader_data()); 61 } else { 62 Devirtualizer::do_klass(closure, klass); 63 } 64 } else { 65 // We would like to assert here (as below) that if klass has been NULL, then 66 // this has been a mirror for a primitive type that we do not need to follow 67 // as they are always strong roots. 68 // However, we might get across a klass that just changed during CMS concurrent 69 // marking if allocation occurred in the old generation. 70 // This is benign here, as we keep alive all CLDs that were loaded during the 71 // CMS concurrent phase in the class loading, i.e. they will be iterated over 72 // and kept alive during remark. 73 // assert(java_lang_Class::is_primitive(obj), "Sanity check"); 74 } 75 } 76 77 oop_oop_iterate_statics<T>(obj, closure); 78 } 79 80 template <typename T, class OopClosureType> 81 void InstanceMirrorKlass::oop_oop_iterate_reverse(oop obj, OopClosureType* closure) { 82 InstanceKlass::oop_oop_iterate_reverse<T>(obj, closure); 83 84 InstanceMirrorKlass::oop_oop_iterate_statics<T>(obj, closure); 85 } 86 87 template <typename T, class OopClosureType> 88 void InstanceMirrorKlass::oop_oop_iterate_statics_bounded(oop obj, 89 OopClosureType* closure, 90 MemRegion mr) { 91 T* p = (T*)start_of_static_fields(obj); 92 T* end = p + java_lang_Class::static_oop_field_count(obj); 93 94 T* const l = (T*)mr.start(); 95 T* const h = (T*)mr.end(); 96 assert(mask_bits((intptr_t)l, sizeof(T)-1) == 0 && 97 mask_bits((intptr_t)h, sizeof(T)-1) == 0, 98 "bounded region must be properly aligned"); 99 100 if (p < l) { 101 p = l; 102 } 103 if (end > h) { 104 end = h; 105 } 106 107 for (;p < end; ++p) { 108 Devirtualizer::do_oop(closure, p); 109 } 110 } 111 112 template <typename T, class OopClosureType> 113 void InstanceMirrorKlass::oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr) { 114 InstanceKlass::oop_oop_iterate_bounded<T>(obj, closure, mr); 115 116 if (Devirtualizer::do_metadata(closure)) { 117 if (mr.contains(obj)) { 118 Klass* klass = java_lang_Class::as_Klass(obj); 119 // We'll get NULL for primitive mirrors. 120 if (klass != NULL) { 121 Devirtualizer::do_klass(closure, klass); 122 } 123 } 124 } 125 126 oop_oop_iterate_statics_bounded<T>(obj, closure, mr); 127 } 128 129 #endif // SHARE_VM_OOPS_INSTANCEMIRRORKLASS_INLINE_HPP |